board/keymile/common/common.c

   1 /*
   2  * (C) Copyright 2008
   3  * Heiko Schocher, DENX Software Engineering, hs@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #if defined(CONFIG_MGCOGE)
  26 #include <mpc8260.h>
  27 #endif
  28 #include <ioports.h>
  29 #include <malloc.h>
  30 #include <hush.h>
  31 #include <net.h>
  32 #include <asm/io.h>
  33
  34 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
  35 #include <libfdt.h>
  36 #endif
  37
  38 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
  39 #include <i2c.h>
  40
  41 extern int i2c_soft_read_pin (void);
  42
  43 int ivm_calc_crc (unsigned char *buf, int len)
  44 {
  45         const unsigned short crc_tab[16] = {
  46                 0x0000, 0xCC01, 0xD801, 0x1400,
  47                 0xF001, 0x3C00, 0x2800, 0xE401,
  48                 0xA001, 0x6C00, 0x7800, 0xB401,
  49                 0x5000, 0x9C01, 0x8801, 0x4400};
  50
  51         unsigned short crc     = 0;   /* final result */
  52         unsigned short r1      = 0;   /* temp */
  53         unsigned char  byte    = 0;   /* input buffer */
  54         int     i;
  55
  56         /* calculate CRC from array data */
  57         for (i = 0; i < len; i++) {
  58                 byte = buf[i];
  59
  60                 /* lower 4 bits */
  61                 r1 = crc_tab[crc & 0xF];
  62                 crc = ((crc) >> 4) & 0x0FFF;
  63                 crc = crc ^ r1 ^ crc_tab[byte & 0xF];
  64
  65                 /* upper 4 bits */
  66                 r1 = crc_tab[crc & 0xF];
  67                 crc = (crc >> 4) & 0x0FFF;
  68                 crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
  69         }
  70         return crc;
  71 }
  72
  73 static int  ivm_set_value (char *name, char *value)
  74 {
  75         char tempbuf[256];
  76
  77         if (value != NULL) {
  78                 sprintf (tempbuf, "%s=%s", name, value);
  79                 return set_local_var (tempbuf, 0);
  80         } else {
  81                 unset_local_var (name);
  82         }
  83         return 0;
  84 }
  85
  86 static int ivm_get_value (unsigned char *buf, int len, char *name, int off,
  87                                 int check)
  88 {
  89         unsigned short  val;
  90         unsigned char   valbuf[30];
  91
  92         if ((buf[off + 0] != buf[off + 2]) &&
  93             (buf[off + 2] != buf[off + 4])) {
  94                 printf ("%s Error corrupted %s\n", __FUNCTION__, name);
  95                 val = -1;
  96         } else {
  97                 val = buf[off + 0] + (buf[off + 1] << 8);
  98                 if ((val == 0) && (check == 1))
  99                         val = -1;
 100         }
 101         sprintf ((char *)valbuf, "%x", val);
 102         ivm_set_value (name, (char *)valbuf);
 103         return val;
 104 }
 105
 106 #define INVENTORYBLOCKSIZE      0x100
 107 #define INVENTORYDATAADDRESS    0x21
 108 #define INVENTORYDATASIZE       (INVENTORYBLOCKSIZE - INVENTORYDATAADDRESS - 3)
 109
 110 #define IVM_POS_SHORT_TEXT              0
 111 #define IVM_POS_MANU_ID                 1
 112 #define IVM_POS_MANU_SERIAL             2
 113 #define IVM_POS_PART_NUMBER             3
 114 #define IVM_POS_BUILD_STATE             4
 115 #define IVM_POS_SUPPLIER_PART_NUMBER    5
 116 #define IVM_POS_DELIVERY_DATE           6
 117 #define IVM_POS_SUPPLIER_BUILD_STATE    7
 118 #define IVM_POS_CUSTOMER_ID             8
 119 #define IVM_POS_CUSTOMER_PROD_ID        9
 120 #define IVM_POS_HISTORY                 10
 121 #define IVM_POS_SYMBOL_ONLY             11
 122
 123 static char convert_char (char c)
 124 {
 125         return (c < ' ' || c > '~') ? '.' : c;
 126 }
 127
 128 static int ivm_findinventorystring (int type,
 129                                         unsigned char* const string,
 130                                         unsigned long maxlen,
 131                                         unsigned char *buf)
 132 {
 133         int xcode = 0;
 134         unsigned long cr = 0;
 135         unsigned long addr = INVENTORYDATAADDRESS;
 136         unsigned long size = 0;
 137         unsigned long nr = type;
 138         int stop = 0;   /* stop on semicolon */
 139
 140         memset(string, '\0', maxlen);
 141         switch (type) {
 142                 case IVM_POS_SYMBOL_ONLY:
 143                         nr = 0;
 144                         stop= 1;
 145                 break;
 146                 default:
 147                         nr = type;
 148                         stop = 0;
 149         }
 150
 151         /* Look for the requested number of CR. */
 152         while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
 153                 if ((buf[addr] == '\r')) {
 154                         cr++;
 155                 }
 156                 addr++;
 157         }
 158
 159         /* the expected number of CR was found until the end of the IVM
 160          *  content --> fill string */
 161         if (addr < INVENTORYDATASIZE) {
 162                 /* Copy the IVM string in the corresponding string */
 163                 for (; (buf[addr] != '\r')                      &&
 164                         ((buf[addr] != ';') ||  (!stop))        &&
 165                         (size < (maxlen - 1)                    &&
 166                         (addr < INVENTORYDATASIZE)); addr++)
 167                 {
 168                         size += sprintf((char *)string + size, "%c",
 169                                                 convert_char (buf[addr]));
 170                 }
 171
 172                 /* copy phase is done: check if everything is ok. If not,
 173                  * the inventory data is most probably corrupted: tell
 174                  * the world there is a problem! */
 175                 if (addr == INVENTORYDATASIZE) {
 176                         xcode = -1;
 177                         printf ("Error end of string not found\n");
 178                 } else if ((size >= (maxlen - 1)) &&
 179                            (buf[addr] != '\r')) {
 180                         xcode = -1;
 181                         printf ("string too long till next CR\n");
 182                 }
 183         } else {
 184                 /* some CR are missing...
 185                  * the inventory data is most probably corrupted */
 186                 xcode = -1;
 187                 printf ("not enough cr found\n");
 188         }
 189         return xcode;
 190 }
 191
 192 #define GET_STRING(name, which, len) \
 193         if (ivm_findinventorystring (which, valbuf, len, buf) == 0) { \
 194                 ivm_set_value (name, (char *)valbuf); \
 195         }
 196
 197 static int ivm_check_crc (unsigned char *buf, int block)
 198 {
 199         unsigned long   crc;
 200         unsigned long   crceeprom;
 201
 202         crc = ivm_calc_crc (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2);
 203         crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \
 204                         buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256);
 205         if (crc != crceeprom) {
 206                 printf ("Error CRC Block: %d EEprom: calculated: %lx EEprom: %lx\n",
 207                         block, crc, crceeprom);
 208                 return -1;
 209         }
 210         return 0;
 211 }
 212
 213 static int ivm_analyze_block2 (unsigned char *buf, int len)
 214 {
 215         unsigned char   valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
 216         unsigned long   count;
 217
 218         /* IVM_MacAddress */
 219         sprintf ((char *)valbuf, "%02X:%02X:%02X:%02X:%02X:%02X",
 220                         buf[1],
 221                         buf[2],
 222                         buf[3],
 223                         buf[4],
 224                         buf[5],
 225                         buf[6]);
 226         ivm_set_value ("IVM_MacAddress", (char *)valbuf);
 227         if (getenv ("ethaddr") == NULL)
 228                 setenv ((char *)"ethaddr", (char *)valbuf);
 229         /* IVM_MacCount */
 230         count = (buf[10] << 24) +
 231                    (buf[11] << 16) +
 232                    (buf[12] << 8)  +
 233                     buf[13];
 234         if (count == 0xffffffff)
 235                 count = 1;
 236         sprintf ((char *)valbuf, "%lx", count);
 237         ivm_set_value ("IVM_MacCount", (char *)valbuf);
 238         return 0;
 239 }
 240
 241 int ivm_analyze_eeprom (unsigned char *buf, int len)
 242 {
 243         unsigned short  val;
 244         unsigned char   valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
 245         unsigned char   *tmp;
 246
 247         if (ivm_check_crc (buf, 0) != 0)
 248                 return -1;
 249
 250         ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_BoardId", 0, 1);
 251         val = ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_HWKey", 6, 1);
 252         if (val != 0xffff) {
 253                 sprintf ((char *)valbuf, "%x", ((val /100) % 10));
 254                 ivm_set_value ("IVM_HWVariant", (char *)valbuf);
 255                 sprintf ((char *)valbuf, "%x", (val % 100));
 256                 ivm_set_value ("IVM_HWVersion", (char *)valbuf);
 257         }
 258         ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_Functions", 12, 0);
 259
 260         GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8)
 261         GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64)
 262         tmp = (unsigned char *) getenv("IVM_DeviceName");
 263         if (tmp) {
 264                 int     len = strlen ((char *)tmp);
 265                 int     i = 0;
 266
 267                 while (i < len) {
 268                         if (tmp[i] == ';') {
 269                                 ivm_set_value ("IVM_ShortText", (char *)&tmp[i + 1]);
 270                                 break;
 271                         }
 272                         i++;
 273                 }
 274                 if (i >= len)
 275                         ivm_set_value ("IVM_ShortText", NULL);
 276         } else {
 277                 ivm_set_value ("IVM_ShortText", NULL);
 278         }
 279         GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32)
 280         GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20)
 281         GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32)
 282         GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32)
 283         GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32)
 284         GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32)
 285         GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32)
 286         GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32)
 287         GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32)
 288
 289         if (ivm_check_crc (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
 290                 return -2;
 291         ivm_analyze_block2 (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], CONFIG_SYS_IVM_EEPROM_PAGE_LEN);
 292
 293         return 0;
 294 }
 295
 296 int ivm_read_eeprom (void)
 297 {
 298 #if defined(CONFIG_I2C_MUX)
 299         I2C_MUX_DEVICE *dev = NULL;
 300 #endif
 301         uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
 302         uchar   *buf;
 303         unsigned dev_addr = CONFIG_SYS_IVM_EEPROM_ADR;
 304
 305 #if defined(CONFIG_I2C_MUX)
 306         /* First init the Bus, select the Bus */
 307 #if defined(CONFIG_SYS_I2C_IVM_BUS)
 308         dev = i2c_mux_ident_muxstring ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
 309 #else
 310         buf = (unsigned char *) getenv ("EEprom_ivm");
 311         if (buf != NULL)
 312                 dev = i2c_mux_ident_muxstring (buf);
 313 #endif
 314         if (dev == NULL) {
 315                 printf ("Error couldnt add Bus for IVM\n");
 316                 return -1;
 317         }
 318         i2c_set_bus_num (dev->busid);
 319 #endif
 320
 321         buf = (unsigned char *) getenv ("EEprom_ivm_addr");
 322         if (buf != NULL)
 323                 dev_addr = simple_strtoul ((char *)buf, NULL, 16);
 324
 325         if (i2c_read(dev_addr, 0, 1, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 0) {
 326                 printf ("Error reading EEprom\n");
 327                 return -2;
 328         }
 329
 330         return ivm_analyze_eeprom (i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN);
 331 }
 332
 333 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
 334 #define DELAY_ABORT_SEQ         62
 335 #define DELAY_HALF_PERIOD       (500 / (CONFIG_SYS_I2C_SPEED / 1000))
 336
 337 #if defined(CONFIG_MGCOGE)
 338 #define SDA_MASK        0x00010000
 339 #define SCL_MASK        0x00020000
 340 static void set_pin (int state, unsigned long mask)
 341 {
 342         volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
 343
 344         if (state)
 345                 iop->pdat |= (mask);
 346         else
 347                 iop->pdat &= ~(mask);
 348
 349         iop->pdir |= (mask);
 350 }
 351
 352 static int get_pin (unsigned long mask)
 353 {
 354         volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
 355
 356         iop->pdir &= ~(mask);
 357         return (0 != (iop->pdat & (mask)));
 358 }
 359
 360 static void set_sda (int state)
 361 {
 362         set_pin (state, SDA_MASK);
 363 }
 364
 365 static void set_scl (int state)
 366 {
 367         set_pin (state, SCL_MASK);
 368 }
 369
 370 static int get_sda (void)
 371 {
 372         return get_pin (SDA_MASK);
 373 }
 374
 375 static int get_scl (void)
 376 {
 377         return get_pin (SCL_MASK);
 378 }
 379
 380 #if defined(CONFIG_HARD_I2C)
 381 static void setports (int gpio)
 382 {
 383         volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
 384
 385         if (gpio) {
 386                 iop->ppar &= ~(SDA_MASK | SCL_MASK);
 387                 iop->podr &= ~(SDA_MASK | SCL_MASK);
 388         } else {
 389                 iop->ppar |= (SDA_MASK | SCL_MASK);
 390                 iop->pdir &= ~(SDA_MASK | SCL_MASK);
 391                 iop->podr |= (SDA_MASK | SCL_MASK);
 392         }
 393 }
 394 #endif
 395 #endif
 396
 397 #if defined(CONFIG_KM8XX)
 398 static void set_sda (int state)
 399 {
 400         I2C_SDA(state);
 401 }
 402
 403 static void set_scl (int state)
 404 {
 405         I2C_SCL(state);
 406 }
 407
 408 static int get_sda (void)
 409 {
 410         return I2C_READ;
 411 }
 412
 413 static int get_scl (void)
 414 {
 415         int     val;
 416
 417         *(unsigned short *)(I2C_BASE_DIR) &=  ~SCL_CONF;
 418         udelay (1);
 419         val = *(unsigned char *)(I2C_BASE_PORT);
 420
 421         return ((val & SCL_BIT) == SCL_BIT);
 422 }
 423
 424 #endif
 425
 426 static void writeStartSeq (void)
 427 {
 428         set_sda (1);
 429         udelay (DELAY_HALF_PERIOD);
 430         set_scl (1);
 431         udelay (DELAY_HALF_PERIOD);
 432         set_sda (0);
 433         udelay (DELAY_HALF_PERIOD);
 434         set_scl (0);
 435         udelay (DELAY_HALF_PERIOD);
 436 }
 437
 438 /* I2C is a synchronous protocol and resets of the processor in the middle
 439    of an access can block the I2C Bus until a powerdown of the full unit is
 440    done. This function toggles the SCL until the SCL and SCA line are
 441    released, but max. 16 times, after this a I2C start-sequence is sent.
 442    This I2C Deblocking mechanism was developed by Keymile in association
 443    with Anatech and Atmel in 1998.
 444  */
 445 static int i2c_make_abort (void)
 446 {
 447         int     scl_state = 0;
 448         int     sda_state = 0;
 449         int     i = 0;
 450         int     ret = 0;
 451
 452         if (!get_sda ()) {
 453                 ret = -1;
 454                 while (i < 16) {
 455                         i++;
 456                         set_scl (0);
 457                         udelay (DELAY_ABORT_SEQ);
 458                         set_scl (1);
 459                         udelay (DELAY_ABORT_SEQ);
 460                         scl_state = get_scl ();
 461                         sda_state = get_sda ();
 462                         if (scl_state && sda_state) {
 463                                 ret = 0;
 464                                 break;
 465                         }
 466                 }
 467         }
 468         if (ret == 0) {
 469                 for (i =0; i < 5; i++) {
 470                         writeStartSeq ();
 471                 }
 472         }
 473         get_sda ();
 474         return ret;
 475 }
 476
 477 /**
 478  * i2c_init_board - reset i2c bus. When the board is powercycled during a
 479  * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
 480  */
 481 void i2c_init_board(void)
 482 {
 483 #if defined(CONFIG_HARD_I2C)
 484         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
 485         volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
 486
 487         /* disable I2C controller first, otherwhise it thinks we want to    */
 488         /* talk to the slave port...                                        */
 489         i2c->i2c_i2mod &= ~0x01;
 490
 491         /* Set the PortPins to GPIO */
 492         setports (1);
 493 #endif
 494
 495         /* Now run the AbortSequence() */
 496         i2c_make_abort ();
 497
 498 #if defined(CONFIG_HARD_I2C)
 499         /* Set the PortPins back to use for I2C */
 500         setports (0);
 501 #endif
 502 }
 503 #endif
 504 #endif
 505
 506 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
 507 int fdt_set_node_and_value (void *blob,
 508                                 char *nodename,
 509                                 char *regname,
 510                                 void *var,
 511                                 int size)
 512 {
 513         int ret = 0;
 514         int nodeoffset = 0;
 515
 516         nodeoffset = fdt_path_offset (blob, nodename);
 517         if (nodeoffset >= 0) {
 518                 ret = fdt_setprop (blob, nodeoffset, regname, var,
 519                                         size);
 520                 if (ret < 0)
 521                         printf("ft_blob_update(): cannot set %s/%s "
 522                                 "property err:%s\n", nodename, regname,
 523                                 fdt_strerror (ret));
 524         } else {
 525                 printf("ft_blob_update(): cannot find %s node "
 526                         "err:%s\n", nodename, fdt_strerror (nodeoffset));
 527         }
 528         return ret;
 529 }
 530 #endif
 531
 532 int ethernet_present (void)
 533 {
 534         return (in_8((u8 *)CONFIG_SYS_PIGGY_BASE + CONFIG_SYS_SLOT_ID_OFF) & 0x80);
 535 }
 536
 537 int board_eth_init (bd_t *bis)
 538 {
 539 #ifdef CONFIG_KEYMILE_HDLC_ENET
 540         (void)keymile_hdlc_enet_initialize (bis);
 541 #endif
 542         if (ethernet_present ()) {
 543                 return -1;
 544         }
 545         return 0;
 546 }